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emit_x64: bug: OP m/r64, imm32 form instructions sign-extend their immediate on x64

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This commit is contained in:
MerryMage 2018-01-13 17:59:50 +00:00
parent 989d036e65
commit e4615a4562
4 changed files with 29 additions and 8 deletions
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4
src/backend_x64/a64_emit_x64.cpp
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@ -180,8 +180,8 @@ void A64EmitX64::EmitA64SetX(A64EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
A64::Reg reg = inst->GetArg(0).GetA64RegRef();
auto addr = qword[r15 + offsetof(A64JitState, reg) + sizeof(u64) * static_cast<size_t>(reg)];
if (args[1].FitsInImmediateU32()) {
code->mov(addr, args[1].GetImmediateU32());
if (args[1].FitsInImmediateS32()) {
code->mov(addr, args[1].GetImmediateS32());
} else if (args[1].IsInXmm()) {
Xbyak::Xmm to_store = ctx.reg_alloc.UseXmm(args[1]);
code->movq(addr, to_store);